LTC3372EUH#TRPBF - 60V Low IQ Buck Controller + 4-Channel 8A Configurable Buck DC/DCs | Analog Devices
MPN： LTC3372EUH#TRPBF ✓ 啟用中LTC3372EUH#TRPBF 概覽
A PMIC (Power Management Integrated Circuit) is a highly integrated device that consolidates multiple power conversion and management functions into a single chip, such as DC/DC converters, LDOs, and battery chargers. The LTC3372 belongs to the class of multioutput switching regulators, which are essential in systems requiring multiple voltage rails from a single input supply, such as industrial, automotive, and communications equipment. By integrating a high-voltage controller and configurable low-voltage bucks, it reduces board space and component count compared to discrete solutions.
Key features include a 60V input capability for the HV controller, low quiescent current (Low IQ) for improved efficiency at light loads, and pin-programmable configurations (C1-C3 pins) that allow the four LV bucks to be assigned to one of eight power configurations. The switching frequency is programmable via an external resistor, enabling optimization between efficiency and component size. The device also includes soft-start, overcurrent protection, and thermal shutdown.
Technically, the LTC3372 uses a current-mode control architecture for fast transient response and stable operation. The HV controller can drive external N-channel MOSFETs, allowing high-current, high-voltage step-down conversion. The LV bucks integrate their power switches, simplifying design and reducing external component count. The pin-strapping configuration provides design flexibility without requiring I2C or SPI communication, making it suitable for standalone applications.
Typical applications include industrial power supplies, automotive infotainment and ADAS systems, telecom and networking equipment, and distributed power architectures. The wide input voltage range and configurable outputs make it ideal for systems that need multiple regulated rails from a 12V or 24V bus.
When designing with the LTC3372, ensure proper PCB layout with adequate ground planes and decoupling capacitors for both the HV controller and LV bucks. The switching frequency should be chosen to balance efficiency and component size, and the inductor values must be selected according to the datasheet guidelines to avoid saturation.
直接替換替代品，適用於 LTC3372EUH#TRPBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC3372EUH#TRPBF （相同外形與佔位） — 差異在於 Package, Synchronous Rectification.
LTC3372EUK#TRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3372HUK#TRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3372EUK#PBF
✅ 直接替換📋 參考替代品（不在目錄中）
LTC3370
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3371
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65270
⚡ 相同封裝 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LTC3372EUH#TRPBF 最大額定值與電氣特性
| Input Voltage Range (HV Controller) | 4.5V to 60V |
| Number of LV Buck Regulators | 4 |
| Total LV Buck Output Current | 8A (configurable as 8x1A, 4x2A, 2x4A, etc.) |
| LV Buck Input Voltage Range | 2.25V to 5.5V |
| Output Voltage Range (LV Bucks) | 0.8V to VIN |
| Switching Frequency Range | 1MHz to 3MHz (programmable via external resistor) |
| 工作接面溫度 | -40°C to 125°C (E-grade: 0°C to 85°C) |
| 封裝 | 48-QFN (7x7mm) |
| 安裝類型 | Surface Mount |
| 腳位數 | 48 |
| Control Architecture | Current Mode |
| 同步整流 | Yes (all N-channel) |
| RoHS 狀態 | Compliant |
LTC3372EUH#TRPBF 腳位配置
| 腳位 1 | VIN_HV — High-voltage input for the buck controller |
| 腳位 2 | SW_HV — Switch node for the high-voltage controller |
| 腳位 3 | BOOST_HV — Bootstrap pin for high-side FET driver |
| 腳位 4 | GND — Ground |
| 腳位 5 | VIN_LV1 — Input for LV buck 1 |
| 腳位 6 | SW1 — Switch node for LV buck 1 |
| 腳位 7 | VOUT1 — Output sense for LV buck 1 |
| 腳位 8 | GND — Ground |
| 腳位 9 | VIN_LV2 — Input for LV buck 2 |
| 腳位 10 | SW2 — Switch node for LV buck 2 |
| 腳位 11 | VOUT2 — Output sense for LV buck 2 |
| 腳位 12 | GND — Ground |
| 腳位 13 | VIN_LV3 — Input for LV buck 3 |
| 腳位 14 | SW3 — Switch node for LV buck 3 |
| 腳位 15 | VOUT3 — Output sense for LV buck 3 |
| 腳位 16 | GND — Ground |
| 腳位 17 | VIN_LV4 — Input for LV buck 4 |
| 腳位 18 | SW4 — Switch node for LV buck 4 |
| 腳位 19 | VOUT4 — Output sense for LV buck 4 |
| 腳位 20 | GND — Ground |
| 腳位 21 | C1 — Configuration pin 1 |
| 腳位 22 | C2 — Configuration pin 2 |
| 腳位 23 | C3 — Configuration pin 3 |
| 腳位 24 | RT — Switching frequency programming pin |
| 腳位 25 | SS — Soft-start programming pin |
| 腳位 26 | EN_HV — Enable for HV controller |
| 腳位 27 | EN_LV — Enable for LV bucks |
| 腳位 28 | PGOOD — Power good indicator |
| 腳位 29 | VCC — Internal supply voltage |
| 腳位 30 | GND — Ground |
| 腳位 31 | EXTVCC — External supply for gate drivers |
| 腳位 32 | GND — Ground |
| 腳位 33 | NC — No connect |
| 腳位 34 | NC — No connect |
| 腳位 35 | NC — No connect |
| 腳位 36 | NC — No connect |
| 腳位 37 | NC — No connect |
| 腳位 38 | NC — No connect |
| 腳位 39 | NC — No connect |
| 腳位 40 | NC — No connect |
| 腳位 41 | NC — No connect |
| 腳位 42 | NC — No connect |
| 腳位 43 | NC — No connect |
| 腳位 44 | NC — No connect |
| 腳位 45 | NC — No connect |
| 腳位 46 | NC — No connect |
| 腳位 47 | NC — No connect |
| 腳位 48 | NC — No connect |
典型應用
LTC3372EUH#TRPBF 適用於 6 應用s: Industrial Power Supplies, Automotive Infotainment and ADAS, Telecom and Networking Equipment, Distributed Power Architectures, Medical Equipment, Portable and Battery-Powered Devices.
Industrial Power Supplies
The LTC3372EUH#TRPBF is ideal for industrial power supplies that require multiple regulated rails from a 24V or 48V bus. Its HV controller handles up to 60V input, while the four LV bucks provide configurable outputs for logic, analog, and I/O rails. The wide input range and low quiescent current ensure efficient operation across varying load conditions, making it suitable for factory automation, process control, and test equipment.
推薦
Automotive Infotainment and ADAS
In automotive systems, the LTC3372EUH#TRPBF provides a compact solution for powering infotainment processors, ADAS sensors, and communication modules. Its 60V input capability handles load dumps and transients, while the configurable LV bucks supply core, I/O, and memory voltages. The -40°C to 125°C operating range meets automotive requirements, and the low IQ improves efficiency during standby modes.
推薦
Telecom and Networking Equipment
The LTC3372EUH#TRPBF is well-suited for telecom and networking equipment that requires multiple voltage rails from a 48V backplane. The HV controller steps down 48V to an intermediate bus, while the LV bucks generate 3.3V, 2.5V, 1.8V, and 1.0V rails for FPGAs, ASICs, and transceivers. The programmable switching frequency allows optimization for EMI and efficiency, critical in dense networking environments.
推薦
Distributed Power Architectures
The LTC3372EUH#TRPBF excels in distributed power architectures where a high-voltage bus is converted to multiple point-of-load rails. Its HV controller can drive external MOSFETs for high-current intermediate bus conversion, while the integrated LV bucks provide precise regulation for sensitive loads. The pin-configurable outputs eliminate the need for digital communication, simplifying design and reducing cost.
推薦
Medical Equipment
In medical equipment, the LTC3372EUH#TRPBF provides reliable multi-rail power for imaging systems, patient monitors, and diagnostic devices. Its wide input range accommodates various power sources, and the low noise operation is critical for sensitive analog circuits. The compact 48-QFN package saves board space, and the configurable outputs allow flexibility in system design.
推薦
Portable and Battery-Powered Devices
The LTC3372EUH#TRPBF can be used in portable devices that require multiple voltage rails from a battery. Its low quiescent current extends battery life, and the configurable LV bucks can be optimized for different load requirements. The wide input range allows operation from various battery chemistries, and the small package is suitable for space-constrained designs.
推薦
推薦產品摘要
工程參考資料，適用於 LTC3372EUH#TRPBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LTC3372EUK#TRPBF | LTC3372HUK#TRPBF | LTC3372EUK#PBF |
|---|---|---|---|---|
| Package | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) | 48-QFN (7x7mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Input Voltage Range (HV) | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V | 4.5V to 60V |
| Total LV Buck Output Current | 8A | 8A | 8A | 8A |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 150°C | -40°C to 125°C |
| Switching Frequency | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz | 1MHz to 3MHz |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tray |
主要差異化特點
- Integrated high-voltage buck controller (對比LTC3370)
- Wide input voltage range up to 60V (對比TPS65270)
- Pin-configurable output currents (對比LTC3371)
設計說明
For the LTC3372EUH#TRPBF, ensure a solid ground plane under the 48-QFN package and place decoupling capacitors close to each VIN pin. The HV controller's switch node (SW_HV) should have a short, wide trace to minimize parasitic inductance. Use a 4-layer PCB with dedicated power and ground planes for optimal performance.
The 48-QFN package has an exposed pad that must be soldered to a thermal via array to dissipate heat effectively. The power dissipation depends on the total output current and voltage drop. For high-current configurations (e.g., 8A total), ensure adequate copper area and airflow to keep the junction temperature below 125°C.
Do not exceed the absolute maximum ratings for VIN_HV (60V) and VIN_LV (5.5V). The C1-C3 configuration pins must be tied to the correct logic levels to avoid unintended output configurations. Also, select the RT resistor carefully to set the switching frequency within the 1MHz to 3MHz range to avoid instability.
合規資訊
RoHS compliant per Analog Devices product page. AEC-Q100 qualification not specified for this variant; consider H-grade for automotive.
